New 20-39pc help

I sold my M&K mx200 with dual 12" drivers and internal 200 watt amp for 20-39pc. I REALLY want to love svs but it does not thump like the M&K did. I could never have the amp volume above half on the M&K and my chest was pounding and my hair moving. With the 20-39pc nothing. I turn it to 3/4 ouput and it just cuts off or mutes and comes back on. It cycles like this over and over again. I calibrated to 80db and tried The opening to Toy Story 2 and the sub shuts down each time. I brought the sub amp down to under half and then will it only stay on during this scene but I cannot hear it at all with any other material at this level. I notice a small rattle under the amplifiers heat sinks as well. It sounds like a loose screw. I cannot get it to stop rattling. I have the Denon 5800 with a 2000 square foot room.
With all the great reviews I must be doing something wrong or does the svs sound that much different from other subs that I may not be used to the svs sound? All of my DTS cd's had heart pounding bass, nothing from the svs. The Antz scene with the stomping foot. Nothing like before. It has to be defective or I'm doing something incorrectly. I assume a sub either works or not. I am gettng sound from it just not the levels I had been used to.
I have sent in two emails to svs support this morning about 7am (Friday) and not heard anything yet so Maybe they can tell me what I'm doing wrong. Many of you that have svs pc subs state you cannot even stay in the same room its so powerful. I want that! I know my M&K was more boomy which is not good but I felt it as well.
I'm thinking maybe I should go with dual 25-31cs' and a samson amp, One cs ultra & amp, or back to M&K. What are your thoughts?
One 20-39pc is not working. I understand my previous M&K sub is twice the price of the 20-39pc. So it may not be fair to compare. But my other two options above may be closer to what I'm looking for.
Any suggestions from ye fellow svs lovers and owners would be appreciated?
Thanks in advance for your responses.
------------------

Troy,
Sounds to me like there is a problem with the amp, although if you are watching at your reference level with the 80dB calibration I could see why the sub might shut down.
Still, if it is you should be getting blasted out of your room.
If it's clear the sub isn't working right (is it in the same position as your old sub?) then we work with you to swap out the amp (takes a few minutes) or send you a new sub.
At the risk for sounding cliche, the exceptionally smooth and "non-boomy" sound of an SVS does take some getting used to for some folks. The lack of mid-bass emphasis can make it seem (at first) as if something is missing. After a bit you notice you can HEAR the bass, in clear articulated ways you never experienced.
Hard to say that's the case here. Certainly if it's working right your SVS should be kicking butt too.
Try this: Turn the crossover-bypass to "OFF" (and turn the crossover knob full to the right. Make sure the bass boost switch is off for now. Turn the amp on the SVS as high as you can and the sub output on your receiver as low as you can (say -6dB if your sub level goes to -12dB). (Just for now turn off the auto-on feature too). Make sure your sub is in a nice closed corner, or wherever you felt the old sub worked well (corners are generally best). Calibrating to 80dB is fine, but not if you are doing ref. level demos. And certainly not if you have various speakers switched to small.
Are you using the same cable you used before? And what are you using to calibrate? If you have access to Video Essentials it'll take some of the guesswork out here.
Get back to both Tom V. and me at [email protected] Sorry for the delayed response, mail has been intense lately. Something is wrong and we'll fix it. If something is NOT wrong then you are just one of those rare persons that does not like the natural bass of an SVS. I'm confident we just have a problem that needs to be resolved, but if it's the latter then getting your money back is a no-brainer.
Ron

>>>I sold my M&K mx200 with dual 12" drivers and internal 200 watt amp for 20-39pc. I REALLY want to love svs but it does not thump like the M&K did. I could never have the amp volume above half on the M&K and my chest was pounding and my hair moving. With the 20-39pc nothing. I turn it to 3/4 ouput and it just cuts off or mutes and comes back on. It cycles like this over and over again. I calibrated to 80db and tried The opening to Toy Story 2 and the sub shuts down each time.>>With all the great reviews I must be doing something wrong or does the svs sound that much different from other subs that I may not be used to the svs sound? All of my DTS cd's had heart pounding bass, nothing from the svs. The Antz scene with the stomping foot. Nothing like before. It has to be defective or I'm doing something incorrectly. I assume a sub either works or not. I am gettng sound from it just not the levels I had been used to.

Many thanks for the suggestions. I bet its exactly what you suggested. I have had M&K for years and its what I have come used to. I will try some of the suggestions you have for me once my wife gets up this morning.
I do have all my speakers set to small and I am using the same cable and room position as my M&K was.
I assme running just one input on the subs input is enough. I know on my M&K I used a Y adapter from the single line out to the left and right input on the sub.
Tom - you mentioned you would have suggested something for me if you knew I was used to M&K. What would it have been?
Again thanks, I have all weekend to play with this.
------------------

Troy,
Twin 25-31CSs with the Samson amp would have still cost you less than the M&K I'd guess (really, what was the street price?) and walk all over the M&K coming and going.
At all ranges I suspect too. Once you start to hear the low bass that's been missing before (depending on what you are watching!) I think you might realize that dumping a ton of mid-high bass into your room might SOUND more punchy, but that doesn't mean it's right.
We'll proceed along the lines of planning on retrieving that sub and perhaps getting you something more suitable. The M&K is a class act, and in it's price range you need to ante up a bit more SVS perhaps to match it in the higher bass ranges.
The rattle you detected is perhaps our biggest reason not to mess with what you have. We need to run that down. Of course if it's at "amp cutout levels" it's hard to fault the sub, if it's at ALL levels then there is something we need to rund down anyway.
Ron

Whatever Troy TN does to bring the output level up, another 20-39 or 2 25-31's, can't he EQ in some more upper mid bass, maybe not as much as with the M & K, but say somewhere in between? That shouldn't gobble up TOO much power if he uses 2 subs, should it? Just a suggestion.
I too am used to boomy subs sound. I have sealed 2-way speakers with small woofers, but in this room with concrete walls and floor, I am able to get 28 hz. Ok, thats at the absolute limit, but its still low and tight sounding. Generally I probably only go down to 35 hz, so I guess thats not really LOW bass.

When I first changed from an Energy 10" subs I was left with this fealing of "hey whats the big deal" as my Energy "sounded" louder. However, after an initial adjustment period and playing some movies like Fight Club which extend way low, I realized what all the fuss was about. There really is an adjustment period to any speaker system or subs or whatever. What I quickly realized was that the Energy would just reject anything under 35hz but would keep getting louder in the 35-40-50 range. I have the Behringer Feedback Destroyer EQ and yes, you can dial in a very boomy sound if you want to for certain movies with the SVS. But I have grown to appreciate a flat spectrum...Clean!
Brian
------------------
Zed's Dead Baby...